Lasting-pincers.



P. A. GOUPAL. LASTING FINGERS. APPLICATION FILED 111111.11, 1910.

' Patented Nov 21,1911.

wa'nessesr JZW/ WW1! W UNITED STATES PATENT OFFICE.

PETER A. COUPAL, OF SOUTH BOSTON, MASSACHUSETTS, ASSIGNOR 0F ONE HALF TO JOHN W. ONEILL, 0F LYNN, MASSACHUSETTS.

LASTING-PINCERS.

Specification of Letters Patent.

Patented Nov. 21, 1911.

This invention relates to improvements inpincers and particularly to improved lasting pincers.

One object of my invention is to provide strong and serviceable but readily separable means for attaching the jaws to the handle levers so thatthe jaws when worn may be replaced by new ones.

Another object is to provide strong and serviceable but readily separable means for attaching the hammer face to the pincers.

Still another object is to provide for the strengthening of the handle levers adjacent to the pivot. To these ends, the invention consists in the novel features of construction and in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims.

Referring to the drawing: Figure 1 is an elevation of a pair of lasting pincers embodying my invention. Fig. 2 is an elevation of the pincers as, viewed from the right hand side of Fig. 1. Fig. 3 is a sectional view taken on line 3-3 of Fig. 1. Fig. 4 is a sectional view taken on line 4-4 of Fig. 2. Fig. 5 is a sectional view taken on line 5-5 of Fig. 1.

Like numerals refer to like parts throughout the several views of the drawing.

. In the drawing,10 and 11 are two handle levers crossed and pivoted to each other by a pivot 12 in the usual manner. These handle levers, for the sake of increased strength, are provided, respectively, with strengthening ribs 13 and 14, one on each face of the pincers, the handle lever 11 being provided with a lateral recess 15 to receive the rib 13 land the handle lever 12 being provided with a lateral recess 16 to receive the rib 14, as

, shown best in Fig. 5. These ribs extend to a considerable distance beyond the pivot togreatly strengthen the handles and prevent them from bending, as most pincers do, at these points.

The handle lever 10 is provided with a detachable jaw 17 and the handle lever 11 is provided with a detachable jaw 18, these jaws being made detachable so that when the corrugations on their inner cooperating faces become badly worn, the jaws may be readily replaced by new ones, thus effecting a great saving, since it is usually necessary to throw lasting pincers away after they have become badly worn. To this end, the jaw 17 is provided with a transverse groove 19 and with a transverse tongue 20 and, similarly, the handle lever 10 is provided with a transverse groove 2land a transverse tongue 22, the tongue 20 being fitted into the groove 21 and the tongue 22 being fitted into the groove 19, these tongues and grooves forming complementary interengaging L-shaped ugs. I

' The jaw 17 is held in place on the handle lever 10 by a screw 23 preferably extending obliquely through said jaw into said lever. This screw prevents lateral displacement of the jaw upon the lever ineither direction. Similarly, the jaw 18 is provided with a transverse groove 24 and with a transverse tongue 25 and the handle lever 11 is provided with a transverse groove 26 and a transverse tongue 27, the tongue 25 being fitted into the complementary interengaging L-shaped lugs.

In the manufacture of the pincers, these lugs and grooves are very readily formed by milling or planing cutters carried thereacross in an obvious manner, this step, in the process of manufacture being very simple and inexpensive and the resultant structure being exceedingly strong, there being not the slightest yielding of the jaws even after a long and severe service.

The jaw 18 is held in place on the handle lever 11 by a screw 28 preferably extending obliquely from said lever into said jaw. The jaws 17 and 18 are provided with the usual corrugations, as shown, and when these corward the free ends of the handles and thus rugations become so badly worn that it would otherwise be necessary to throw the pincers away, the jaws may be readily removed by the simple removal of the screws 23 and 28 and new aws substituted for the old ones. In this way, a considerable saving is efiected.

The handle lever 10 is provided with a hammer 29 having a removable face 30 which is provided, as usual, with corrugations 31. hen this hammer face becomes badly worn, it is desirable to have it readily removable so that it may be replaced by another and yet it will be understood that the mode of attachment must be such as to insure great rigidity and strength. To this end, the hammer face 30 is provided with a dovetailed tongue 32 which, as clearly shown in Fig. 3, extends only part way across this tongue fitting into a corresponding dovetailed groove 33 which also extends only part way across the hammer 29.

In practice, in the manufacture of the tool, the groove 33 is milled by an end milling cutter of the proper cross sectional form. The tongue 32 is provided with a longitudinal hole 34 which receives a screw 35 having screw-threaded engagement with the body of the hammer 29, as shown 1n Flg. 3.

Preferably, the tongue 32 is provided with; a longitudinal slot 36 communicating with the hole 34, as shown in Fig. 4, and the screw 35 is provided with a tapered head 37 fitting a corresponding taper provided in the hole 34 so that when the screw is rotated in the proper direction, it will draw the tongue engage the sides of the groove 33 and pre- The hammer face when vent any looseness. thus secured is as strong and rigid as if it were an integral construction and yet the face may be removed and replaced by an other with great facility.

Thus the pincers hay e all the advantages of ordinary pincers of integral construction and yet have the added advantage over the ordinary pincers in that the aws and hammer face when worn may be very readily replaced by new ones.

Having thus described my invention, what I claim and desire by Letters Patent to secure is 1. Pincers having, in combination, a pair of handle levers, and a pair of jaws mounted on said handle levers, respectively, said levers being respectively provided with opposed transverse tongues extending toward each other, said levers being also provided with opposed transverse grooves, and said jaws being respectively provided with tongues extending in opposite directions and respectively located in said grooves, and said jaws being respectively provided with grooves each having two opposite faces in which grooves said opposed tongues of said levers are respectively located.

2. Pincers having, in combination, a pair of handle levers, a pair of jaws mounted on said handle levers, respectively, said handle levers being provided, respectively, with complementary L-shaped lugs having opposed tongues extending toward each other, and means to hold said jaws against lateral displacement relative to their respective handle levers.

3. Pincers having, in combination, a pair of handle levers, a pair of jaws mounted on said handle levers, respectively, said levers being respectively provided with opposed transverse tongues extending toward each other, said levers being also provided with opposed transverse grooves, and said jaws being respectively provided with tongues extending in opposite directions and respectively located in said grooves, and said jaws being respectively provided with grooves each having two opposite faces in which grooves said opposed tongues of said levers are respectively located, and fastening means extending obliquely from said handle lever into said aw.

4L. In combination, a handle member and a work-performing member one of which is provided with a groove extending part way thereacross and the other of which is provided with a tongue located in said groove, and means to force said tongue longitudinally into said groove and expand said tongue transversely in said groove.

5. In combination, a handle member and a work-performing member one of which is provided with a groove and the other of which is provided with a longitudinally split tongue located in said groove, and a screw having a tapered portion to expand said split tongue in said groove.

.6. In combination, a handle member and a work-performing member one of which is provided with a groove extending part way thereacross and the other of which is provided with a tongue interlocking with said groove, said tongue being provided with a longitudinal slot, and a screw extending longitudinally through said tongue and having screw-threaded engagement with said grooved member, said screw having a tapered portion to expand said tongue in said groove.

7. In combination, a handle member and a work-performing member one of which is provided with a groove extending part way thereacross and the other of which is provided with a tongue dovetailed into said groove, said tongue being provided with a longitudinal slot, and provided also with a tapered hole extending longitudinally of and communicating with said slot, and a screw located in said hole and having screwthreaded engagement with said grooved member.

8. A handle member and a work-performing member one of which is provided with a groove extending part way thereacross and the other of which is provided with a tongue 1 dovetailed into said groove, said tongue being provided with a longitudinal hole, and

a screw located in said hole and adapted to draw said tongue into said groove.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

PETER A. COUPAL.

Witnesses:

JOHN W. ONEILL, LOUIS A. JONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, D. C. 

